Influence of Licomont BS-100 and Viscodor PV-2 Additives on the Rate of Technological Aging of Asphalt Concrete Mixture

The service life of asphalt concrete depends to a large extent on the intensity of aging of the bituminous binder included in its composition. Introduction of modifying additives into bitumen makes it possible to slow down the rate of thermal degradation processes. This article presents a comparative evaluation of the effect of domestic additive based on synthetic waxes Viskodor PV-2 and imported additive Licomont BS-100 on the aging rate of bituminous binder and asphalt concrete mixture. The results of the study of changes in the aging process by RTFOT and USK (simplified short-term aging) methods of physical and chemical properties of the binder modified by additives, such as softening point, needle penetration depth at 25 °C, brittleness temperature, are presented. On the basis of changes in the process of thermostatization of asphalt concrete mixtures at the temperature of their preparation such indicators as strength at 20 and 50 °С, water resistance and crack resistance, the aging coefficients characterizing the dynamics of bituminous binder thermodegradation processes were determined.